I Reincarnated as a Strong Character Type Unrelated to the Story

Just by chance, there was a presence there – the strongest.
A Japanese-style RPG based on modern times, “Neon Light”.
I, who spent my life on that game and loved it so much that I played it over and over again,
am now standing on the stage of that dream – no, I was reincarnated.
The character I was reincarnated as is a young man in a tired salaryman style named “Lux,” whom I have never seen even in conversations,
a strong character that makes you worry if the game balance will collapse.
Despite living quietly to not ruin the scenario of the beloved game… saving characters who were supposed to die, being respected by the final boss more than the original protagonist – how did this happen!?
An out-of-setting character unconsciously overpowering!? A new sensation, an otherworldly fantasy!